Don Luis Pacheco de Narváez (1570s–1640) was a 17th century Spanish philosopher and fencing master. Born in Baeza, Jaén in the early 1570s, he became the greatest student of Jerónimo Sánchez de Carranza, the grand master of the new school of Spanish fence called la Verdadera Destreza ("the True Skill"). After Carranza's death in 1600, Pacheco seems to have assumed his mantle of leadership in the Destreza, and ultimately was appointed Head Master of Arms to the royal court by King Phillip IV in 1624.

Pacheco was a very controversial figure in his time. Well known in Spanish literary and political circles, he was occasionally lampooned for his overly-intellectual and philosophical approach to fencing. In 1608, this lead to a duel with noted author Francisco Gómez de Quevedo. In the first pass, Quevedo knocked Pacheco's hat from his head; the duel was subsequently broken up and thereafter the men remained enemies. (Later, Pacheco went as far as to report four of Quevedo's books to the Inquisition.)

Despite drawing on the prestige of Carranza to great effect in his early career, later in life Pacheco seems to have grown tired of living in his master's shadow. Particularly after becoming the crown fencing master and charged with certifying new masters, he devoted great energy to undermining Carranza's legacy and to exposing (and correcting) perceived flaws in his Destreza. This ultimately broke the tradition into two competing camps, called Carrancistas and Pachequistas, a schism that was never mended.